public class Cidcle extends Shape{
    private double r;
    final private static double Pi = 3.14;

    public Cidcle(double r) {
        this.r = r;
    }
    public void draw(){
        System.out.println("圆:r = "+r);
    }
    @Override
    public void calcArea(){
        area = Pi*r*r;
    }
}
